Đang chuẩn bị liên kết để tải về tài liệu:
Ebook Wonders California content reader - Grade 3

(BQ) Ebook Wonders California content reader - Grade 3 includes energy; the future of energy; description writing frame; critical thinking; energy and matter; water troubles; compare contrast writing frame; elements and atoms; problem solution writing framel; the atomic age and something else. | B The McGraw-Hill Companies Grew Macmillan McGraw-Hill Published by Macmillan McGraw-Hill of McGraw-Hill Education a division of The McGraw-Hill Companies Inc. Two Penn Plaza New York New York 10121. Copyright by The McGraw-Hill Companies Inc. All rights reserved. No part of this publication may be reproduced or distributed in any form or by any means or stored in a database or retrieval system without the prior written consent of The McGraw-Hill Companies Inc. including but not limited to network storage or transmission or broadcast for distance learning. Printed in the United States of America 2 3 4 5 6 7 8 9 10 073 12 11 10 09 Science Physical Sciences 1. Energy and matter have multiple forms and can be changed from one form to another. As a basis for understanding this concept a. Students know energy comes from the Sun to Earth in the form of light. b. Students know sources of stored energy take many forms such as food fuel and batteries. c. Students know machines and living things convert stored energy to motion and heat. d. Students know energy can be carried from one place to another by waves such as water waves and sound waves by electric current and by moving objects. e. Students know matter has three forms solid liquid and gas. f. Students know evaporation and melting are changes that occur when the objects are heated. g. Students know that when two or more substances are combined a new substance may be formed with properties that are different from those of the original materials. h. Students know all matter is made of small particles called atoms too small to see with the naked eye. i. Students know people once thought that earth wind fire and water were the basic elements that made up all matter. Science experiments show that there are more than 100 different types of atoms which are presented on the periodic table of the elements. 2. Light has a source and travels in a direction. As a basis for understanding this concept a. Students know sunlight can